/Engine/Source/Runtime/Engine/Classes/GameFramework/ProjectileMovementComponent.h
Determine the number of frames to allow to skip when interpolating. Returning 0 means not to allow throttling. Default implementation chooses between ThrottleInterpolationThresholdNotRenderedShortTime and ThrottleInterpolationThresholdNotRenderedLongTime based on WasRecentlyRendered(), extend or override this for custom behavior.
virtual int32 ComputeThrottleInterpolationMaxFrames ( float DeltaTime, [USceneComponent](API\Runtime\Engine\Components\USceneComponent) * InterpComponent )